Drawing roller



Dec. 14, 1954 F. DLLING ETAL DRAWING ROLLER Filed Deo In venia/*6 LLM/ Patented Dec. 14, 1954 DRAWING ROLLER Fritz Dlling and Carl Ludwig Kmpers, Rheine, Germany, assiguors to F. A. Kumpers K. G., Rheine, Westphalia, Germany Application December 19, 1950, Serial No. 201,522

2 Claims. (Cl. 19-131) Every spinf ner knows the trouble caused, especially in the case of the inclined drafting or drawing apparatus of the ine spinning machine, through shifting of the holders, owing to these weak screws failing to give sufiicient hold.

This was the reason for devising drafting apparatus with swinging or rocking rollers which are given their axially parallel position in relation to the lower roller lby means of a swinging arm. The holders for the guidance of the upper rollers may thereby be omitted.

Drafting apparatus with screWless pressure-roller holders have also been proposed, where the holders for the lateral pivot guidance are retained, whereas the setting and shifting is eected by means other than screws.

Drawing-roller apparatus has also been proposed wherein tape cages are used for the guidance of the upper rollers, similar to those used for two-tape drawing apparatus. The end pivots of the upper rollers, and therefore the holders, may be omitted in this case also.

All these proposals are practicable and have been made use of in practice. The present invention proposes a pressure saddle (saddle hook) intended to carry the upper rollers in the usual saddle seat or bea-ring. The invention consists in the front and middle upper rollers obtaining their axially parallel position relative to the lower rollers by -a pressure saddle which bears against the turning rail. The pressure saddle is preferably so shaped that it has at its lower part a projection or extension which bears against the turning rail.

The accompanying drawing shows by way of example in side elevation a single-adjustment drawing apparatus with the pressure saddle according to the invention.

I, II and III are the lower rollers, and 1, 2 and 3 the upper rollers; 4 is the turning rail, 5 the pressure saddle, and 6 the extension of the pressure saddle down to the turning rail 4, against which the extension bears.

The extension 6 acts as a stop or support for the pressure saddle, thereby determining the position of the upper rollers. Since the saddle seat is now the only bearing of the upper rollers, the recesses in the pressure saddle must be suitably formed. More specifically, it will be noted that the saddle 5 is provided with semi-circular recesses 1A and 2A which rest upon journals 1 and 2 of the rollers 1 and 2. The axes of the semi-circular recesses are parallel to the axes of the rollers 1 'and 2. It is known in connection with tape drawing-roller apparatus that the turning rail must be built at a precise distance from the front lower roller, and if this turning rail is now used, by the aid of the pressure saddle according to the invention, as a base for the bearing of' the upper rollers, the correct and unalterable position of the upper rollers is ensured. The upper rollers will in any case be axially parallel to the lower rollers, and in particular the front upper roller will retain its predetermined position in relation to the front lower roller.

Another important advantage of the invention is that the number of parts of such drawing-roller apparatus is considerably less than that of other similar designs already known.

We claim:

l. A tape draw-frame comprising: front, middle and rear pairs of upper and lower drawing rollers, a turning rail, and a pressure saddle bearing against the said turning rail, the said pressure saddle being formed with substantially semi-circular recesses by which it rests upon the journals of the front and middle upper rollers, the axes of these recesses being parallel to the axes of the front and middle lower rollers.

2. A tape draw-frame comprising: front, middle and rear pairs of upper and lower drawing rollers, a turning rail, a pressure saddle, an extension of the pressure saddle, the said extension bearing against the said turning rail, and the said pressure saddle being formed with substantially semi-cylindrical recesses by which it rests upon the journals of the front and middle upper rollers, the axes of these recesses being parallel to the axes of the front and middle lower rollers.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,532,275 Whittaker Nov. 28, 1950 2,565,228 Gwaltney et al. Aug. 2l, 1951 

